Steam turbine



K. BAUMANN.

STEAM TURBI-NE.

APPLICATION FILED ramas. 1919,

INVE NTOR #Nav K. BAUMANN.

STEAM TURBINE.

Arme/mon Huso fsa. 2s. |919.

VENTOR y ATTO/WVEY K. BAUMANN. STEAM TuR'lNE.

APPLICATION FILED FEB. 28. 1919. 1,412,827. PwntdApr. 18, 1922.

mvEN-ron HY Traa/vif k. BAUMAN-N.

STEAM TURBINE.

APPLICATION FILED FEB. 2B. |919. 1,412,827. Pwnted Apr. 18, 1922.

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rs A lNvENToR @www Arron/wirr UNITED STATES PATENT ottica.

KARL BAUMANN, URMSTON, ENGLAND, ASSIGNOR TO THEBRITISHWESTING- HOUSE ELECTRIC AND MANUFACTURING COMPANY LIMITED, A CORPORATION OF GREAT BRITAIN. f

STEAM TURBINE.

'i i Specification of Letters Patent. y PatlltediApl'. 18, 1922.

Application filed February 28, 1919. n Serial No. 279,747.

To all whom 'it may concern: y

Be it known that I, KARL BAUMANN, a citizen of the Confederation of Switzerland, and a resident of Urmston, in the `county of Lancaster, England,l have invent-V ed a new and useful Improvement'in or Relating to Steam Turbines, of which the following is a specification.

This invention relates to' steam turbines and more particularly to turbines which are partly or wholly supported inposition-on their foundationsby feet on', the ends of Y the exhaust casing.

provided with `means for Ventilating the same during operation, such for example as an alternating current generator with forced ventilation and suchmachine is lo'-` cated at the exhaust or low pressure end of the turbine, it has hitherto been necesthe l:duct for supplying air to themachine being located between Athe exhaust casing of the turbine and said machine, the overall length of the set beingincreasedby the space needed toacconnnodate the air duct.

machine vdriven thereby may be located in close proximity to one another land the overall length of the set thereby reduced, the supporting feet or somev of' them at 'the end of the exhaust casingy of the turbine are,

according to the preseiit'invention', so con-y structed that they `may also be usedas .air ducts for the supply of air for Ventilating the driven machine.

Several forms in which the invention mayV be carried into effect are illustrated vby way of example in the accompanying drawings in which Figure 1 is a central vertical section of a portion of the rear end of the exhaust casing of a turbine and of the end bell, air trunk and Ventilating fan of a dynamo electric machine driven by the turbine, the supporting feet of the turbine be ing constructed in accordance with this invention. Figure 2 is a halfkend view `of the construction illustrated in Figure with the end bell, yfan and air trunk` shown in Figure l removed.` Figure 3 is a similar view to Figure 2 but with the end bell, fan and air trunk shownin Figure 1 in position. Figure 4 is a view similar to Figure 1 shewing a modified construction. Figure 5 is an end View of the same taken on the line Where a steam turbine `drives a machine y 187,857, filed 23rd August,'1917.` sary to provide suliicient space to permit of IV-IV of Figure 4..' Figure 6 is a View similar to Figure 1 showing another modified construction, igure 7 being an end view of the constructions shown iny Figure 6 with the end bell, air trunk and fan removed. Figure 8 is an end view of a still further constructional form which the in- -vention may take, Figure 9 being a central sectional view of the same taken on the line VIII- VIII of Figure 8 with 'the end bell and air trunk in position.

In theV constructional forms ofthe invention illustratedy in the drawings the turbine is supported Vin positionby feetlof. cated at the ends only of the Yexhaust casing of the turbine. rIurbines haring -supporting feet ofthisfgeneral character" are, for example, illustrated in the specification of'-patent application, Serial 'No.`

Referring now to Figures'1,`2` and 3, the

lrearfend of the exhaust casing of? the turbine is illustratedat v10, theturbine shaft Y y p of the turbine 13 project from the Vrear wall In order that a turbine and a ventilated y 10 of thev exhaust casing of thevturbine and lbear on'apsoleplate 14 resting-jon the Vfoundations 15 of the plant. The ,supporting `feet include a pluralityw of projecting webs orA ribs 16, 17, 18, the inner. ones 17, 18 being of less depth than the outer ribs 16 inorder that the end bell `19 ofthe machine driven by the turbine may approach as closely as possible to the latter. A fan 20 mountedonthe shaft 12 drawsair for Ventilating the machine driven by the turbine through vchannels provided in the sole plate 141- as shown by the arrows between the ribs 16 and 17, 17 and 1S of the supporting feet 13 and thence-through an airtrunlr 21 attached to the endbell 19 and connecting with the upper ends of the supporting feet r13 as shown.

a machined tace on its lower edge to which the other portion 25 ot the lower part ci'i the end bell is secured by bolts. In other respects the construction does not diter materially `from that illustrated in ures 1 to 3.

The construction illustrated in Figures 6 and 7 permits of the machine driven by the turbine being located still nearer the turbine itself. In this construction the air for ventilating the machine is caused to pass between the ribs forming the supporting feet of the turbine across the rear wall oi? the exhaust casing oi: the turbine 10, the air entering the turbine feet from a wind trunk 26 located between the -foundations 15 and the shell 27 of the condenser which is here shown bolted direct to the exhaust casing 10 of the turbine. A transverse wall 2S connects the ribs 16, 17 and 18 of the feet to form a Ventilating channel. The upper ends of the ribs where they adjoin the exhaust casing 10 are extended outwardly, as shewn at 29, to form a support :for the air trunk 21, attached. to the exterior of the end bell 19.

The construction shewn in Figures 8 and 9 is very similar to that illustrated in Figl ures 6 and 7 with the exceptionthat the air trunk 21 is considerably reduced in height and is provided with an internal guide wall 80 located at its upper end for directing the iii-flowing air into the aperture in the end bell 19. In Figure 8 the upper end of the rib 17 oi 'the supporting feet 13 is curved as shewn at 3l for the purpose of directing the flow of the Ventilating air into the tan 20. In this construction the upper end of the transverse wall 28 is provided with a machined face 29 to which a corresponding face formed on the lower portion of the end bell 19 is bolted.

In the construction shewn in Figures G to 9 in Which the air passes over the end wall of the exhaust casing of the turbine the latter is preferably provided with sheet lagging so that the air passing through the duets or channels will not become unduly heated before entering the machine driven by t-he turbine.

I claim as my invention:

l. In a turbine installation, the combination of an exhaust casing, supporting means for the exhaust casing, a driven cleiiuent requiring cooling medium arranged adjacent to said casing, and cooling medium passages provided in the supporting means for supplying cooling medium to the driven element.

2. In a turbine installation, the combination of an exhaust casing, supporting means for the easing, a driven mechanism having an enclosing casing and requiring cooling medium, passageways in` the supporting means for supplying a cooling medium, and

a chamber or trunk communicating with the passageways and with the interior of said enclosing casing.

3. In a turbine installation, the combination of an exhaust casing, a dynamo-electric machine arranged close to the exhaust casing, supporting feet tor the exhaust casing, and air passages in the feet :for supplying cooling air to the dynamo-electric machine.

il. In a turbine installation, the comliiination oi? an exhaust casing, a dynamo-electric machine arranged close to the exhaust casing, supporting feet for the exhaust casing, air passages formed in the `teet and communicating with the interior ot' said dynamoelectric machine, and means carried by a rotatable element of said machine for inducing a circulation of cooling' air.

In a turbine installation, the combination or an exhaust casing, a dynamo-electric machine arranged close to the exhaust casing, supporting lreet for the exhaust casing, air passages in the supporting feet, and an air trunlr or chamber communicating with said passages and with the interior ot said machine.

6. In a turbine installation, the combination ot an exhaust casing, a dynamo-electric machine arranged close to the exhaust casing and having an end bell, supporting feet for the exhaust casing and air passages formed in lthe feet and communicating with the iuterior of said end bell.

7 In a turbine installation, the combination of an exhaust casing, a dynamo-electric machine arranged close to the exhaust casing and having an end bell, supporting feet tor the exhaust casing, air passages formed in the supporting teet, and a trunk or chamber carried by the end bell and affording communication between the passages a nd the interior of said end bell.

8. In a turbine installation, the combination ol. an exhaust casing, a f lymlnio-cleetric machine ar an ged close to the exhaust casing and having an end bell, supporting feet 4For the exhaust casing, air passages formed iu. the supporting feet, a trunk or chamber carried by the end bell and affording communication between the passages and the interior of said end hell, and means carried hy au element of said dynamo-electric machine for inducing a circulation oit air.

9. In a turbine installation, the combination ot au exhaust vasing, a dynamo-electrio machine arranged close to the exhaust casing and having an end bell provided with a sh u tt aperture, supporting feet 'lor the exhaust casing, air passages provided in the supporting feet, a trunk or chamber on the end bell communicating with the passages and with the shaft aperture and guide means in the trunk or chamber for directing air toward the shaft aperture.

10, In a turbine installation, the combination of an exhaust casing, a dynamo-electric machine having an end bell arranged closev ing with the ribs to define air passages, and means for affording communication between,

the passages and the'interior of said end bell.

11. In a turbine installation, the combination of an exhaust casing, a dynamo-electric machine having an end bell arranged close to the exhaust casing, supporting feet for the exhaust casing havin@ ribs, means cooperatingr With the ribs to (Ieineair passages, an air trunk or chamber carried by the end-bell for affording communication between the passages and the interior of said end bell. Y

12. In a turbine installation, the combination of an exhaust casing, a dynamo-electric machine arranged close to the exhaust casing, supporting feet for the exhaust casing having vertical ribs, means cooperating with the ribs to deline air passages, a trunk or chamber communicating with the passages and with the interior of the end bell for supplying cooling air to the latter.

13. In a turbine installation, the combination of an exhaust casing, a dynamo-electric machine arranged close to the exhaust ycasing and having an end bell, supportinb` feet for the exhaust casing having vertical ribs, means cooperating With the ribs to define air passages, a trunk or chamber communicating With the passages and with the interior ofthe end bell for supplying cooling air to the end bell and means arranged Within the end bell for inducing a circulation of cooling air. i

14C. A turbine-driven electric unit comprising a dynamo-electric machine, a turbine having supporting feet kprovided With air passages and having a portion shaped to constitute a part of the electric machine end-casing, a kcasing element cooperating with said casing portion of the feet, and a second element cooperating with the first element to constitute a passageway for air in communication with the passages of the feet and With the interior of the casing.

In testimony whereof I have hereunto subscribed -Iny name this tenth day of January, 1919.

KARL BAUMANN. 

